Wet injection detection and prevention system and method

Abstract

In an embodiment, a medicament delivery system is provided. The medicament delivery system includes a container for storing a medicament prior to use, the container having a first end and a second end, an injection member in fluid communication with the container, an actuation mechanism associated with the container and configured to deliver the medicament from the container through the injection member when the actuation mechanism is activated. The medicament delivery system further includes at least one detection element associated with the system, wherein in a first mode of operation of the system, medicament is delivered through the injection member and in a second mode of operation of the system, medicament is not delivered through the injection member, and the mode of operation is dependent on an output from the at least one detection element.

What is claimed is: 
     
         1 . A method of detecting a wet injection during a patient injection in a medicament delivery system comprising a housing, an injection member, a first container containing a medicament dose, the first container being in fluid communication with said injection member, a stopper movably positioned in the container, at least one sensing element that senses the position of the stopper in the container, and at least one detection element that detects contact between the housing or injection member and a patient, said method comprising:
 sensing an amount of medicament in the container based on the position of the stopper in the container; and   detecting a condition of the system during the patient injection, wherein the condition comprises incomplete delivery of medicament based on the amount of medicament in the container upon detecting no contact between the medicament delivery system and the patient.   
     
     
         2 . The method of  claim 1 , further comprising storing the condition detected. 
     
     
         3 . The method of  claim 1 , further comprising generating an output based on the condition detected. 
     
     
         4 . The method of  claim 1 , further comprising preventing further delivery of medicament through the injection member when removal of the injection member from the patient is detected and the incomplete delivery of medicament is sensed. 
     
     
         5 . The method of  claim 4 , further comprising providing an indication to the patient to rehabilitate the medicament delivery system to complete the medicament dose. 
     
     
         6 . The method of  claim 5 , wherein the indication to the patient to rehabilitate the system to complete the medicament dose further comprises an indication to the patient to replace the first container with a second container and activate the medicament delivery system to inject a calculated medicament dose amount substantially equivalent to the medicament dose remaining in the first container. 
     
     
         7 . The method of  claim 5 , wherein providing the indication to the patient to rehabilitate the system to complete the medicament dose further comprises an indication to the patient to re-insert the injection member into the patient and activate the medicament delivery system to complete the medicament dose remaining in the first container. 
     
     
         8 . The method of  claim 5 , wherein providing the indication to the patient to rehabilitate the system to complete the medicament dose further comprises an indication to the patient to replace the injection member with an unused injection member and activate the medicament delivery system to complete the medicament dose remaining in the first container.